[mapserver-users] LAYER example for kernerdensity wanted

[Jeff McKenna]

On 2014-10-20 2:15 PM, Jeff McKenna wrote:
> On 2014-09-27 4:51 PM, Rahkonen Jukka (Tike) wrote:
>> Hi,
>>
>> I am running MapServer version 6.5-dev on Windows and I suppose it has
>> the support for kerneldensity layers. Could someone show the LAYER
>> part that works with the Natural Earth populated places dataset
>> http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/cultural/ne_10m_populated_places.zip?
>> I have created .qix index but not touched the data in other ways.
>>
>> I have indeed managed to get some coloured stripes out at some scales
>> but what I mostly get is Internal server error (http 500).
>> MS_ERRORFILE does not show any errors and Apache error log is probably
>> recording just this:
>> [Sat Sep 27 21:57:27 2014] [error] [client 127.0.0.1] Premature end of
>> script headers: mapserv.exe
>>
>> My current LAYER (or layers, one for data and one for kerneldensity):
>>
>> LAYER
>> NAME "points"
>> DATA "c:\data\ne\ne_10m_populated_places"
>> TYPE POINT
>>      STATUS ON
>>      PROJECTION
>>          "init=epsg:4326"
>>      END
>>      debug 5
>>      CLASS
>>         STYLE
>>                     SIZE 5
>>                     SYMBOL "circle"
>>                     COLOR 200 200 200
>>                     OUTLINECOLOR 0 0 0
>>          END
>>      END
>> END
>> layer
>>      name "heatmap"
>>      type raster
>>      connectiontype kerneldensity
>>      connection "points"
>>      status on
>>      debug 5
>>      #processing "RANGE_COLORSPACE=HSL"
>>      processing "KERNELDENSITY_RADIUS=20"
>>      processing "KERNELDENSITY_ATTRIBUTE=RANK_MIN"
>>      #processing "KERNELDENSITY_COMPUTE_BORDERS=ON"
>>      processing "KERNELDENSITY_NORMALIZATION=AUTO"
>>      offsite 0 0 0
>>      class
>>        style
>>          COLORRANGE  "#0000ff00"  "#0000ffff"
>>          DATARANGE 0 32
>>        end
>>        style
>>          COLORRANGE  "#0000ffff"  "#ff0000ff"
>>          DATARANGE 32 255
>>        end
>>      end
>>    end
>>
>> What I have tried so far has been to comment out this and that but
>> result seems to be always the same.
>>
>> -Jukka Rahkonen-
>
> Hi Jukka,
>
> The good news/bad news is that I can reproduce this same issue on
> Windows, with MapServer-master and GDAL (both trunk and 1.11.1 release).
>   I have built both MapServer and GDAL in debug mode, and have placed
> the debug messages (and test case) in a ticket at
> https://github.com/mapserver/mapserver/issues/5019  It seems to crash on
> a memcpy call by GDAL, hmmm...
>
>
> -jeff
>

Update: fixed by EvenR in MapServer-master!  Thanks Even!

-jeff




-- 
Jeff McKenna
MapServer Consulting and Training Services
http://www.gatewaygeomatics.com/